1
GATE CSE 2002
Subjective
+5
-0
Let $$A$$ be a set of $$n\left( { > 0} \right)$$ elements. Let $${N_r}$$ be the number of binary relations on $$A$$ and Let $${N_r}$$ be the number of functions from $$A$$ to $$A$$.
(a) Give the expression for $${N_r}$$ in terms of $$n$$.
(b) Give the expression for $${N_f}$$ in terms of $$n$$.
(c) Which is larger for all possible $$n, $$ $${N_r}$$ or $${N_f}$$?
2
GATE CSE 2002
Subjective
+2
-0
Obtain the eigen values of the matrix $$$A = \left[ {\matrix{ 1 & 2 & {34} & {49} \cr 0 & 2 & {43} & {94} \cr 0 & 0 & { - 2} & {104} \cr 0 & 0 & 0 & { - 1} \cr } } \right]$$$
3
GATE CSE 2002
MCQ (Single Correct Answer)
+2
-0.6
The function $$f\left( {x,y} \right) = 2{x^2} + 2xy - {y^3}$$ has
A
Only one stationary point at $$(0, 0)$$
B
Two stationary points at $$(0, 0)$$ and $$\left( {{1 \over 6},{{ - 1} \over 3}} \right)$$
C
Two stationary points at $$(0, 0)$$ and $$(1, -1)$$
D
no stationary points.
4
GATE CSE 2002
MCQ (Single Correct Answer)
+1
-0.3
"If X then Y unless Z" is represented by which of the following formulas in propositional logic? (" $$\neg $$ " is negation, " $$ \wedge $$ " is conjunction, and " $$ \to $$ " is implication)
A
$$\left( {{\rm X} \wedge \neg Z} \right) \to Y$$
B
$$\left( {X \wedge Y} \right) \to \neg Z$$
C
$${\rm X} \to \left( {Y \wedge \neg Z} \right)$$
D
$$\left( {{\rm X} \to Y} \right) \wedge \neg Z$$
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